( 15) 



blackish, iu strong contrast with the ferruginous back. In other respects it does 

 not differ from S. r. rutilans. 



Type in Tring Museum : ? ad., Itaituba, Santarem, 22. i. 06. No. 481. Wing 61 ; 

 tail 66 ; bill 14 mm. 



Of this form, I have before me three specimens from Santarem, and four from 

 Chamicuros, N.E. Peru (Bartlett coll.) ; and I examined three others from Peru, 

 in the British Museum. I am nnable to see any differences between the Peruvian 

 and Santarem skins. The ferruginous back serves to distinguish them at a glance 

 from the two other forms. Even the young birds have a considerable amount of 

 rufous on the mautle. 



c. Synallaxis rutilans tertia n. subsp. 



S. rutilans (nee Temm.)Pelzeln, Oni. Brasil. i. (1867) p. 36 (part. : Engenho do Grama aud Irisanga). 



Hab. Central Brazil : Engenho do Gama, Mattogrosso ; Irisanga, northern 

 S. Paulo (Natterer). 



Adult. Very similar to S. r. rutilans, which it resembles in having the fore- 

 head and sides of the head only ferruginous aud sharply defined against the brown 

 cap, but differs by the more rufescent olive-brown tinge of the upper parts ; by the 

 lateral interscapular feathers being exteriorly broadly edged with ferruginous ; and 

 particularly by the rump and upper tail-coverts being bright rufescent olive-brown 

 like the back, and not fuliginous. 



Type in Vienna Museum: No. 20198. ¥ ad., Engenho do Gama, Mattogrosso, 

 August 16, 1826. Collected by J. von Natterer.— Wing 63; tail G4i ; bill 13£ mm. 



There are three examples of this form in the Vienna Museum, all obtained by 

 Natterer. One is a young bird, which differs from the adult only in being paler. 



It is very interesting that S. r. tertia, though inhabiting a very remote district, 

 should more resemble the typical form than does the representative of the Amazonas 

 valley. 



(L Synallaxis rutilans omissa Hart. 



Synallaxis omissa Hartert, Bull. Brit. Oni. CI. x>. p. 71 (1901. — Para); Hellmayr. Nov. Zool. xiii. 



(1906) p. 365 (Prata, Para) ; Snethlage, Journ.f. Ornith. 1906. p. 023 (Para). 

 S. nililitus (nee Temminck), Sclater & Salviu, P.Z.S. 1867. p. 574 (Para) ; Sclater, Cat. Birds 



Brit. Mas. xv. (18'JO) p. 57 (part. : specimen b, Para) ; Snethlage, I.e. p. 523 (Pani, Rio Capitn, 



R. Guarua). 



Hab. N.E. Brazil: vicinity of Para, (Wallace, Steere, Hoffmanns). 



This is undoubtedly a geographical form of the S. rutilans group, although, at 

 first sight, it looks rather different. The bill is of exactly the same shape : short 

 and thickish ; the tail equally short and uniform blackish ; the coloration of the 

 wings is the same as in S. rutilans and allies ; and there is also the characteristic 

 dull black patch on the throat. It differs, however, at a glance by the lack of 

 rufous on the head aud under parts. The whole lower surface (except the blackish 

 throat-patch), the top and sides of the head as well as the upper tail-coverts are 

 uniform dull fuliginous; the back is a little more brownish, aud some of the lateral 

 interscapular feathers show slight ferruginous edges on the outer webs. Immature 

 birds have also the chest aud sides of the neck slightly washed with pale ferruginous. 



According to Dr. Snethlage (in litt.) 6'. r. omissa alone occurs iu the Pani 

 district. 



